Integrating SolarEdge PV Inverters with Victron GX Devices

Key Takeaways

• Ensure SolarEdge inverter firmware meets the minimum requirements for integration.
• Activate "Alternative Power Source mode" (APS) in your SolarEdge inverter for AC-coupling.
• Properly configure frequency shifting parameters for effective off-grid power control.
• Contact SolarEdge Support to enable critical backend parameters for full functionality.

How do I integrate SolarEdge PV inverters with Victron GX devices?

Integrating SolarEdge PV inverters with Victron GX devices allows for robust AC-coupled hybrid systems, enabling features like zero feed-in and frequency shifting for off-grid operation. The process involves verifying inverter compatibility and firmware, enabling the "Alternative Power Source mode" (APS), configuring frequency shifting parameters, and setting up communication protocols.

Diagnosis and Setup Steps

Successful integration requires careful configuration of both your SolarEdge inverter and your Victron GX device. Follow these steps to ensure proper communication and operation.

Step 1: Verify SolarEdge Inverter Compatibility and Firmware

First, confirm your SolarEdge inverter supports the "Alternative Power Source mode" (APS). This feature is available for 3-phase and 1-phase HDwave inverters.

Next, check your inverter's firmware version:

• For SetApp (screenless) inverters: Firmware 4.8.24 or higher is required.
• For LCD inverters: Firmware 3.25xx or higher is required.

If your firmware is outdated, update it according to SolarEdge's instructions before proceeding.

Step 2: Enable Alternative Power Source (APS) Mode

The APS mode allows the SolarEdge inverter to operate within an extended frequency and voltage range, crucial for AC-coupling with Victron systems.

• For SetApp inverters: Navigate through the inverter's commissioning menu: Commissioning -> Communication -> GPIO -> Power Reduction Interface (RRCR) Mode -> Alternative Power Source.
• For LCD inverters: Navigate through the inverter's menu: Communication -> GPIO Conf -> Device Type -> Alternative Power Src.

If you have multiple SolarEdge inverters, the "Alternative Power Source mode" should be configured on the master inverter. Once configured, the master inverter automatically sets all detected slave inverters to APS mode.

Step 3: Configure Frequency Shifting (P(f) Parameters)

Frequency shifting is vital for power control in off-grid scenarios, allowing the Victron system to regulate the SolarEdge inverter's output.

Configure the P(f) parameters as follows:

• P0: Set to 50.2Hz, 100% Power. This means the solar converter will start reducing its output power at 50.2Hz.
• P1: Set to 51.2Hz, 0% Power. Output power will be reduced to a minimum when the frequency reaches 51.2Hz. The converter will disconnect when the frequency is higher than 51.5Hz.

These settings should be applied to all SolarEdge inverters on site.

Step 4: Set up Communication (ModbusTCP and SunSpec)

For the Victron GX device to monitor and control the SolarEdge inverter, communication protocols must be correctly configured. Ensure both the GX Device and the SolarEdge system are on the same LAN or WiFi network. It is advised to assign a static IP address to the SolarEdge inverter by disabling DHCP.

• ModbusTCP:
• • For SetApp inverters: Navigate to Communication -> Modbus TCP port -> Modbus TCP -> Edit port to 502.
  • For LCD inverters: Navigate to Communication -> LAN Conf -> Modbus TCP -> TCP Port -> Edit port to 502.
• SunSpec (for monitoring):
• • For SetApp inverters: Navigate to Communication -> RS481 -> Protocol -> SunSpec (Non-SE Logger) -> Device ID -> Edit to 126.
  • For LCD inverters: Navigate to Communication -> RS481 -> Device Type -> Non-SE Logger -> Device ID -> Edit to 126.

Step 5: Integrate Multiple SolarEdge Inverters (if applicable)

If your system includes multiple SolarEdge inverters, additional steps are needed for proper integration:

• Interconnection: The SolarEdge inverters need to be interconnected via RS485-1, with a Leader/follower configuration.
• Dry-relay contact: Only the Leader SolarEdge inverter requires the dry-relay contact connection. This dry-contact is used for sensing the grid supply. Victron’s auxiliary Dry-Out can also be used. Connect twisted pair wires from the dry contact terminals to the L1 and V terminals of the Communication Board inside the inverter.
• Grid Control: Enable Grid Control for all SolarEdge inverters on site by navigating to Power control -> Grid Control -> Enable.
• TCP Connection: Each inverter requires its own TCP connection and IP address with the same SunSpec setting.

Step 6: Contact SolarEdge Support for Backend Parameter Change

In addition to the settings configured on the inverter, it is important to contact SolarEdge Support. They need to change a parameter in the backend to fully enable frequency shifting with APS mode. This step is critical for the system to function as intended, especially in off-grid scenarios.

Settings Table: SolarEdge Inverter Configuration for Victron GX Integration

This table summarizes the key settings required on your SolarEdge inverter for successful integration with Victron GX devices.

Safety: Working with AC-Coupled Systems

Working with AC-coupled PV and battery systems involves high voltages and currents. Always prioritize safety. Before performing any wiring or configuration changes, ensure all AC and DC power sources are disconnected. This includes isolating the PV array, disconnecting the battery bank, and switching off the grid supply. Wait for capacitors to discharge before opening any enclosures. Only qualified personnel should perform electrical work. This integration guide focuses on software settings; physical installation and wiring must adhere to local electrical codes and manufacturer guidelines.

When to call a technician instead

While this guide provides detailed steps for integrating SolarEdge and Victron GX devices, certain aspects require professional intervention. You should contact a qualified technician or SolarEdge Support if:

• You are unable to update your inverter firmware or access specific settings.
• You encounter persistent communication errors between the devices.
• You need to change the backend parameter for frequency shifting, as this requires direct interaction with SolarEdge Support.
• You are unsure about any wiring or electrical connections, especially when dealing with multiple inverters or grid-tie configurations.
• Your system is not performing as expected after following all configuration steps.
• You need assistance with the "Factor 1.0 rule" for AC coupled system sizing from Victron Energy, as specific details are not provided here.

Attempting complex electrical work without proper training and tools can be dangerous and may void product warranties.